28088971996 has 24 divisors (see below), whose sum is σ = 52058482560. Its totient is φ = 13233347952.

The previous prime is 28088971943. The next prime is 28088971997. The reversal of 28088971996 is 69917988082.

It is a Harshad number since it is a multiple of its sum of digits (67).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28088971997) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2272306 + ... + 2284633.

It is an arithmetic number, because the mean of its divisors is an integer number (2169103440).

Almost surely, 2^28088971996 is an apocalyptic number.

It is an amenable number.

28088971996 is a deficient number, since it is larger than the sum of its proper divisors (23969510564).

28088971996 is a wasteful number, since it uses less digits than its factorization.

28088971996 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4557033 (or 4557031 counting only the distinct ones).

The product of its (nonzero) digits is 31352832, while the sum is 67.

The spelling of 28088971996 in words is "twenty-eight billion, eighty-eight million, nine hundred seventy-one thousand, nine hundred ninety-six".